| // Copyright (c) 2017, the Dart project authors. Please see the AUTHORS file |
| // for details. All rights reserved. Use of this source code is governed by a |
| // BSD-style license that can be found in the LICENSE file. |
| |
| /// @assertion Iterable<T> map<T>(T f(E e)) |
| /// ... |
| /// The transformed elements will not be cached. Iterating multiple times over |
| /// the returned Iterable will invoke the supplied function f multiple times on |
| /// the same element. |
| /// @description Checks that iterating multiple times over the returned Iterable |
| /// will invoke the supplied function f multiple times on the same element. |
| /// @author ngl@unipro.ru |
| |
| |
| import "dart:typed_data"; |
| import "../../../Utils/expect.dart"; |
| |
| Int32x4 i32x4(n) => new Int32x4(n, n, n, n); |
| |
| main() { |
| var counter = 0; |
| f(e) { |
| counter++; |
| return e.z; |
| } |
| var list = [i32x4(0), i32x4(1), i32x4(2), i32x4(1), i32x4(3), i32x4(4)]; |
| var l = new Int32x4List.fromList(list); |
| var res = l.map(f); |
| var it1 = res.iterator; |
| var it2 = res.iterator; |
| var i = 0; |
| |
| Expect.equals(0, counter); |
| while (it1.moveNext()) { |
| Expect.equals(++i, counter); |
| it2.moveNext(); |
| Expect.equals(++i, counter); |
| Expect.equals(it1.current, it2.current); |
| } |
| Expect.equals(res.length * 2, counter); |
| } |